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Finding the Fourth Proportional to 454.11, 680.70 and 317.12

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Solution

The fourth proportional to 454.11, 680.70 and 317.12 is: 475.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.11 : 680.70 = 317.12 : x
  2. Step 2: Convert to fraction form
    454.11/680.70 = 317.12/x
  3. Step 3: Cross multiply
    454.11x = 680.70 × 317.12
  4. Step 4: Simplify right side
    454.11x = 215,861.37
  5. Step 5: Solve for x
    x = 215,861.37/454.11
  6. Step 6: Final answer
    x = 475.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.